<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            padding:0;
            margin:0;
        }
        #app{
            position: relative;
            width: 320px;
            height: 480px;
            margin:0 auto;
            background-image:url("./img/game_bg.jpg");
        }
        #score{
            position: absolute;
            left:65px;
            top:10px;
            font-size: 20px;
            color:skyblue;
        }
        #progress {
            position: absolute;
            left: 63px;
            top: 66px;
            width: 180px;
            height: 16px;
            background: url(./img/progress.png);
        }
        #start{
            position: absolute;
            top:200px;
            font-size: 30px;
            color:white;
            left:50%;
            transform: translateX(-50%);
        }
        #start:hover{
            color:red;
            cursor: pointer;
        }
    </style>
</head>
<body>
    <div id="app">
        <div id="score">0</div>
        <div id="progress"></div>
        <div id="start">开始</div>
    </div>
</body>
</html>